Add some async/await tests.

tests/language/language.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ $compiler == none ]
 built_in_identifier_prefix_test: Fail # Issue 6970
 await_for_cancel_test: RuntimeError # Issue 21404
@@ skipping 15 matching lines @@
 deferred_constraints_constants_test/*: Fail, Pass # Issue 17523
 deferred_shadow_load_library_test: Fail # Issue 17523
 deferred_closurize_load_library_test: Fail  # Issue 17523
 deferred_inlined_test: Fail  # Issue 17523
 deferred_optimized_test: Fail  # Issue 17523
 enum_mirror_test: Skip # Issue 11511.
 
 override_inheritance_mixed_test/08: Fail # Issue 18124
 override_inheritance_mixed_test/09: Fail # Issue 18124
 
+async_await_test/03: RuntimeError
+
 [ $compiler == none || $compiler == dart2dart ]
 # Non-contractive types are not supported in the vm.
 cyclic_type_test/02: Fail, OK
 cyclic_type_test/04: Fail, OK
 cyclic_type2_test: Fail, OK
 least_upper_bound_expansive_test/*: Fail, OK
 async_throw_in_catch_test: Crash, RuntimeError # Issue 21404 or it could be a test error
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium|| $runtime == ContentShellOnAndroid) ]
 async_throw_in_catch_test: Timeout, Fail # Issue 21404 or it could be a test error
 
 [ $compiler == none && $runtime == vm ]
 class_keyword_test/02: MissingCompileTimeError # Issue 13627
 unicode_bom_test: Fail # Issue 16067
 
 [ $compiler == none && $checked ]
 type_variable_bounds4_test/01: Fail # Issue 14006
 
 [ $compiler == none ]
 dynamic_prefix_core_test/01: RuntimeError # Issue 12478
 
-[ $compiler == none && ($runtime == vm || $runtime == drt || $runtime == dartium|| $runtime == ContentShellOnAndroid) ]
+[ $compiler == none && ($runtime == vm || $runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 dynamic_prefix_core_test/none: Fail # Issue 12478
 export_ambiguous_main_negative_test: Fail # Issue 14763
 
+[ $runtime == vm || $runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid ]
+async_star_test/01: CompileTimeError
+async_star_test/02: RuntimeError
+async_star_test/03: RuntimeError
+async_star_test/04: RuntimeError
+async_star_test/05: Timeout
+
 [ $compiler == none && ($runtime == dartium || $runtime == ContentShellOnAndroid) && $unchecked ]
 assertion_test: Fail # Issue 13719: Please triage this failure.
 generic_test: Fail # Issue 13719: Please triage this failure.
 list_literal4_test: Fail # Issue 13719: Please triage this failure.
 map_literal4_test: Fail # Issue 13719: Please triage this failure.
 named_parameters_type_test/01: Fail # Issue 13719: Please triage this failure.
 named_parameters_type_test/02: Fail # Issue 13719: Please triage this failure.
 named_parameters_type_test/03: Fail # Issue 13719: Please triage this failure.
 positional_parameters_type_test/01: Fail # Issue 13719: Please triage this failure.
 positional_parameters_type_test/02: Fail # Issue 13719: Please triage this failure.
@@ skipping 28 matching lines @@
 
 [ $compiler == none && ($runtime == dartium || $runtime == drt || $runtime == ContentShellOnAndroid) && $mode == debug ]
 large_class_declaration_test: SkipSlow # Times out. Issue 20352
 
 [ $compiler == none && $runtime == ContentShellOnAndroid ]
 gc_test: SkipSlow # Times out flakily. Issue 20956
 
 [ $compiler == none && $runtime == vm && ( $arch == simarm || $arch == arm || $arch == simarm64 || $arch == arm64 || $arch == simmips || $arch == mips) ]
 vm/load_to_load_unaligned_forwarding_vm_test: Pass, Crash # Unaligned offset. Issue 22151